Salted Caramel Pretzel Brownies

INGREDIENTS

4 cups

small pretzels, crushed into small pieces

6 tbsp

butter, melted

1/3 cup

Dutch-processed cocoa

1/2 cup

plus 2 tablespoons boiling water

2 oz

unsweetened chocolate, chopped fine

1/2 cup

plus 2 tablespoons vegetable oil

4 tbsp

unsalted butter, melted

large eggs plus 2 large yolks

2 tsp

vanilla extract

2 1/2 cups

sugar

1 3/4 cups

all-purpose flour

3/4 tsp

salt

1 cup

Salted Caramel Sauce

Flaky Sea Salt for Sprinkling